Hybrid vehicle and control method for same
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsHiroki Endo, Koji Hokoi
Life of this patent
Estimating the term…
Abstract
A vehicle is provided with an engine, a battery, a second motor generator generating a driving force by using electric power of the battery, and an electronic control unit (ECU) controlling the engine and the second motor generator. The ECU is configured to be capable of executing rotation speed increase control for controlling the rotation speed of the engine so that the sound pressure of the engine is increased in response to an increase in the vehicle speed of the vehicle. In a charge depleting (CD) mode in which the state of charge (SOC) of the battery is consumed, the ECU limits the execution of the rotation speed increase control compared to a charge sustaining (CS) mode in which the SOC is maintained in a predetermined range.
Claims8
A hybrid vehicle comprising:
- an internal combustion engine;
- an electric power storage device;
- a rotary electric machine configured to generate a driving force by using electric power of the electric power storage device;
- and
- an electronic control unit configured to
- (i) control the internal combustion engine and the rotary electric machine,
- (ii) execute rotation speed increase control for controlling a rotation speed of the internal combustion engine so as to increase a sound pressure of the internal combustion engine in response to an increase in a vehicle speed of the hybrid vehicle, and
- (iii) limit the execution of the rotation speed increase control in a case where the rotation speed of the internal combustion engine is positioned in a predetermined area during a charge depleting mode compared to a case where the internal combustion engine is in a driving state during a charge sustaining mode, the predetermined area being an area in which an increment in the engine sound pressure increases more than another area with respect to an increment in the vehicle speed, in the charge depleting mode a state of charge of the electric power storage device being consumed, and in the charge sustaining mode the state of charge of the electric power storage device being maintained in a predetermined range.
A control method for a hybrid vehicle, the hybrid vehicle including an internal combustion engine, an electric power storage device, a rotary electric machine generating a driving force by using electric power of the electric power storage device, and an electronic control unit, the control method comprising:
- executing, by the electronic control unit, rotation speed increase control for controlling a rotation speed of the internal combustion engine so as to increase a sound pressure of the internal combustion engine in response to an increase in a vehicle speed of the hybrid vehicle;
- and
- limiting, by the electronic control unit, the execution of the rotation speed increase control in a case where the rotation speed of the internal combustion engine is positioned in a predetermined area during a charge depleting mode compared to a case where the internal combustion engine is in a driving state during a charge sustaining mode, the predetermined area being an area in which an increment in the engine sound pressure increases more than another area with respect to an increment in the vehicle speed, in the charge depleting mode a state of charge of the electric power storage device being consumed, and in the charge sustaining mode the state of charge of the electric power storage device being maintained in a predetermined range.
Dependencies are inferred from the claim text.